JP2014084140A - Spout stopper and packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spout stopper, which easily drains off water entering between a spout and a cap, and can secure enough strength of the spout even in the case of reducing the amount of resin used for forming the spout.SOLUTION: A spout stopper 1 includes: a spout 2 having a cylindrical side wall 4, one end of which is opened, a male screw 5 provided on the outer surface of the side wall 4, and a flange 6 provided on the other end side of the side wall 4; and a cap 3 engaged with the spout 2. The male screw 5 is provided with a skip screw part 12a where the male screw 5 is intermittently cut out in a constant cycle so that the cutout parts are arranged side by side in the axial direction of the spout 3. In the side wall 4, the thickness of a part corresponding to the skip screw part 12a is larger than the thickness of a part not having any skip screw part.

Description

  The present invention relates to a spout stopper that is attached to a packaging container that contains liquid, powder, granules, or the like.

  For the purpose of packaging sake, seasonings, and the like, a paper pack container having a spout stopper composed of a spout having a cylindrical side wall and a cap that is detachably screwed to the spout is widely used. In a typical spout stopper, a sealing plate for closing the inside of the spout and a pull ring connected to the sealing plate are provided inside the side wall of the spout. By removing the cap from the spout and pulling the pull ring to pull out the sealing plate, the packaging container can be opened and the contents extracted through the inside of the side wall of the spout. Moreover, even if the contents remain in the packaging container, the contents in the packaging container can be sealed by screwing the cap onto the spout.

Japanese Patent Laid-Open No. 2004-67101

  In the process of filling the contents of the packaging container as described above using a filling machine, the following processing is performed. First, the spout stopper with the cap screwed onto the spout is attached to a packaging container such as a paper pack. Next, the contents are filled at a high temperature from the inlet of the packaging container provided separately from the spout stopper, and the inlet is sealed by heat sealing or the like. Next, cooling water is showered on the entire packaging container after filling the contents to cool the high temperature contents. Thereafter, a process such as covering the entire packaging container with a shrink film is performed as necessary.

  When the hot contents are filled, the spout stopper is also heated. When cooling water is showered on the entire packaging container after high temperature filling, the spout cap is also cooled, so that the space between the spout and the cap is in a reduced pressure state. When the space between the spout and the cap is reduced in pressure, the showered cooling water may enter the space between the spout and the cap through the gap between the spout and the cap. The water that has entered between the spout and the cap gradually escapes from the gap between the spout and the cap as time elapses, but it is preferable that the water has drained before subsequent processing such as packaging with a shrink film. . Therefore, the spout stopper is required to have a structure excellent in water drainage.

  In addition to the above-described problem of running out of water, it is required to reduce the amount of resin used for spout molding from the viewpoint of resource saving. Furthermore, even when the spout is thinned to reduce the amount of resin, it is required that the strength of the spout is sufficiently maintained.

  Therefore, the present invention provides a spout plug that can easily drain water that has entered between the spout and the cap and can secure sufficient spout strength even when the amount of resin used to form the spout is reduced. With the goal.

  The spout stopper according to the present invention includes a spout having a cylindrical side wall with one end opened, a male screw provided on the outer surface of the side wall, and a flange provided on the other end side of the side wall, and screwed into the spout. And a cap. The male screw is provided with a jump screw portion in which the cut portions are arranged in the axial direction of the spout by intermittently cutting the male screw at a constant period. The thickness of the portion of the side wall corresponding to the jump screw portion is larger than the thickness of the portion where the jump screw portion is not provided.

  According to the present invention, since the gap between the spout and the cap is increased by providing the jump screw portion on the male screw, the water that has entered between the spout and the cap is more easily removed than the spout without the jump screw portion. Can be fast. In addition, since the thickness of the portion corresponding to the jump screw portion of the side wall is larger than the thickness of the portion where the jump screw portion is not provided, the jump screw portion is provided even when the side wall of the spout is thinned. The resulting strength reduction of spout can be suppressed. That is, according to the present invention, it is possible to realize a spout stopper that can easily drain water that has entered between the spout and the cap and can secure sufficient spout strength even when the amount of resin used to form the spout is reduced. .

The longitudinal cross-sectional view of the spout stopper which concerns on 1st Embodiment The front view of the spout which comprises the spout stopper which concerns on 1st Embodiment Top view of the spout shown in FIG. Sectional view along line IV-IV shown in FIGS. The top view of the spout which comprises the spout stopper which concerns on 2nd Embodiment.

(First embodiment)
1 is a longitudinal sectional view of a spout stopper according to the first embodiment, FIG. 2 is a front view of a spout constituting the spout stopper according to the first embodiment, and FIG. 2 is a top view of the spout shown in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line IV-IV shown in FIGS.

  The spout 1 is composed of a spout 2 and a cap 3. The spout stopper 1 is attached to the container main body so that the spout penetrates the opening provided in the container main body (not shown) from the inner side to the outer side, and constitutes a packaging container. The spout stopper 1 is used for extracting the contents filled in the container body.

  The spout 2 is an integrally molded product of resin, and includes a side wall 4, a male screw 5, a flange 6, a sealing plate 7, a support column 8, a pull ring 9, and a paper presser 10. As a material for forming the spout 2, for example, low density polyethylene can be used.

  The side wall 4 has a cylindrical shape, and one end (the upper end in FIG. 2) is open. The side wall 4 is a portion that becomes a flow path when the contents filled in the container body are extracted.

  The male screw 5 is provided on the outer peripheral surface of the side wall 4. The male screw 5 is provided with a plurality of notches intermittently at a constant period. As shown in FIGS. 2 and 3, the plurality of notches provided in the male screw 5 are arranged so as to be aligned in the axial direction of the spout 2 (vertical direction in FIG. 2). Flying screw portions 12a to 12c are configured. Although the number of flying screw parts is arbitrary, it is preferable that it is 1-6 places, More preferably, it is 2-4 places.

  The flange 6 is provided so as to protrude outward from the side wall 4 from the other end side (the lower end side in FIG. 2) of the side wall 4. The flange 6 is a part used for heat-sealing the spout 2 to a container body such as a paper pack.

  The blocking plate 7 is a member that closes the inside of the side wall 4. When the sealing plate 7 closes the inside of the side wall 4, the sealing property of the packaging container when not opened is ensured.

  The column 8 and the pull ring 9 are parts used to separate the blocking plate 7 from the spout 2. One end of the column 8 is connected to the blocking plate 7, and the other end of the column 8 is connected to the pull ring 9. At the time of opening the packaging container, by inserting a finger into the pull ring 9 and pulling it outward, the thin portion provided on the sealing plate 7 is broken and the sealing plate 7 can be separated.

  When the paper stopper 10 is inserted through the opening of the container main body, the paper stopper 10 inserts the part of the container main body between the flange 6 and heat seals. It is for temporarily fixing. The structure of the paper presser 10 is arbitrary. Further, the paper presser 10 is not essential and may not be provided.

  The cap 3 is detachably attached to the spout 2. More specifically, a female screw is provided on the inner peripheral wall of the cap 3, and is screwed into a male screw provided on the side wall 4 of the spout 2. As a material for forming the cap 3, for example, polypropylene can be used.

  Thus, the spout 2 according to the present embodiment is provided with a plurality of jump screw portions 12 a to 12 c in the circumferential direction of the side wall 4. Since the clearance between the spout 2 and the cap 3 is increased by providing the flying screw portions 12a to 12c, water enters between the spout 2 and the cap 3 as compared with the case where the flying screw portions 12a to 12c are not provided. Even in this case, water can be expelled quickly.

  Here, the thickness of the side wall 4 will be described.

  As shown in FIG. 3, in the present embodiment, the side wall 4 has ribs 11a to 11c on the inner peripheral surface side of the portion corresponding to the jump screw portions 12a to 12b. By having the ribs 11a to 11c, the radial thickness of the side wall 4 is not constant, and the thickness of the portion corresponding to the jump screw portions 12a to 12c is larger than the thickness of the portion where the jump screw portion is not provided. Yes.

  When the flying screw portions 12a to 12c are provided, there is a problem that the strength of the spout 2 is reduced at the cutout portion of the male screw 5. When the strength of the spout 2 is insufficient, if a large torque is applied when the cap 3 is tightened, the cap 3 does not stop at a predetermined screwing position, and the female screw of the cap 3 is over due to the deformation of the spout 2. There is also a problem that it becomes easier to run.

  Further, when the side wall 4 of the spout 2 is thinned in order to reduce the amount of resin required for molding the spout 2, the strength reduction of the spout 2 due to the presence of the flying screw portions 12a to 12c becomes remarkable. When the strength of the spout 2 is reduced, the spout 2 is likely to be distorted, and there is a possibility that the sealing performance when the cap 3 is tightened may be reduced.

  With respect to such a problem, in the spout plug 1 according to the present embodiment, the spout 2 is formed so that the thickness of the portion where the jump screw portions 12a to 12c are provided is larger than the thickness of the portion where there is no jump screw portion. Since the side wall 4 is configured, even when the side wall 4 is thinned, the strength reduction of the spout 2 can be suppressed. Therefore, in spout stopper 1 concerning this embodiment, since deformation of spout 2 is controlled, the overrun at the time of cap 3 tightening and the fall of the airtightness at the time of cap 3 tightening can be reduced.

  Therefore, according to the present embodiment, water that has entered between the spout 2 and the cap 3 is easily removed, and even when the side wall 4 is thinned by reducing the amount of resin used to form the spout 2, it is sufficient. The spout stopper 1 that can ensure the strength of the spout 2 can be realized.

  Furthermore, in a state where the packaging container is once opened and then resealed with the cap 3, the pressure inside the container body may increase or decrease with the temperature change of the external environment. If the flying screw portions 12a to 12c are provided as in the present embodiment, when the cap 3 is opened from the resealed state, the flying screw portions 12a to 12c become gas flow paths, and the inside of the container body and the external environment There is also an effect that the pressure difference can be quickly eliminated.

  4, the thickness T2 of the rib 11a on the flange 6 side of the side wall 4 is larger than the thickness T1 of the rib 11a at the open end of the side wall 4, and the thickness of the rib 11a is from the open end side of the side wall 4. More preferably, it increases toward the flange 6 side. When the rib 11a is formed in this way, the thickness T0 of the side wall 4 also increases from the open end side of the side wall 4 toward the flange 6 side. Although not shown in FIG. 4, the other ribs 11b and 11c are configured similarly. If comprised in this way, since the intensity | strength of the root part of the spout 2 will improve, the overrun at the time of fastening of the cap 3 can be suppressed still more effectively. In addition, by forming the side wall 4 so as to increase in thickness toward the flange 6 in this way, it is possible to reduce the thickness of the open end side portion of the side wall 4.

  However, if the thickness T0 of the side wall 4 is formed so as to increase from the open end side of the side wall 4 to the flange 6 side, the thickness of the rib 11a is from the open end side of the side wall 4 to the flange 6 side. May be substantially constant (ie, T1 = T2). For example, the outer peripheral surface of the side wall 4 is formed in a forward tapered shape so that the outer diameter of the side wall 4 increases from the open end side toward the flange 6 side, and from the central axis of the spout 2 to the inner peripheral surface of the rib 11a. The rib 11a is formed so that the rib 11a is substantially perpendicular to the flange 6 and the thickness of the rib 11a is substantially constant from the open end side toward the flange 6 side so that the distance is substantially constant. May be. In this case, the connecting portion of the rib 11a (the portion corresponding to the vertical broken line shown in FIG. 4) is substantially perpendicular to the flange 6. Alternatively, as another example, the outer peripheral surface of the side wall 4 is formed substantially perpendicular to the flange 6 so that the outer diameter of the side wall becomes substantially constant from the open end side toward the flange 6 side. The inner surface of the rib 11a is inclined so that the distance from the central axis to the inner peripheral surface of the rib 11a decreases from the open end side toward the flange side 6, and the rib 11a has a thickness from the open end side to the flange 6 side. The rib 11a may be formed so as to be substantially constant toward the front. In this case, the connecting portion of the rib 11a (the portion corresponding to the vertical broken line shown in FIG. 4) is inclined with respect to the flange 6. Even when any of these modified examples is adopted, the rib 11a can obtain the same effect as the spout 2 shown in FIG.

(Second Embodiment)
FIG. 5 is a top view of a spout constituting the spout stopper according to the second embodiment.

  Also in this embodiment, the side wall 4 of the spout 2 is configured such that the thickness of the portion where the jump screw portions 12a to 12c are provided is larger than the thickness of the portion where there is no jump screw portion. However, in the spout 2 of the present embodiment, as shown in FIG. 5, the thickness of the side wall 4 gradually decreases from the portion where the jump screw portions 12 a to 12 c are provided to the portion where the jump screw portion is not provided. Is configured to do. In other words, the spout 2 according to the present embodiment is the spout 2 according to the first embodiment, in which both end edge portions of the ribs 11a to 11c in the circumferential direction of the side wall 4 are connected to the inner periphery of the side wall where the jump screw portion is not provided. It can be said that it is smoothly connected to the surface.

  Even in the case where the spout 2 is configured in this way, the water that has entered between the spout 2 and the cap 3 is easily removed and the amount of resin used to form the spout 2 is reduced as in the first embodiment. Even when the side wall 4 is thinned, the spout 1 that can secure sufficient strength of the spout 2 can be realized.

(Other embodiments)
In each of the above embodiments, the case where the male screw 5 is a single screw has been described, but the number and pitch of the screws are arbitrary.

  Moreover, in each said embodiment, although the spout 2 is provided with the sealing board 7, the support | pillar 8, and the pull ring 9, also with respect to the spout without the sealing board 7, the support | pillar 8, and the pull ring 9, The present invention is equally applicable.

  Furthermore, in each said embodiment, although the part of the side wall 4 corresponding to each of the jump screw parts 12a-12c is formed so that it may become thicker than the part without a jump screw part, the jump screw parts 12a-12c and It is not necessary for the relatively thick portion of the side wall 4 to correspond one-to-one, and the portion of the side wall 4 corresponding to at least one jump screw portion is formed thicker than the inner portion of the jump screw portion. It ’s fine.

  Further, in each of the above-described embodiments, the size of the portion that relatively increases the thickness of the side wall 4 corresponding to the jump screw portions 12a to 12c may be equal to or larger than the size of the jump screw portions 12a to 12c. The upper and lower positions of the portion are preferably designed so as not to interfere with the inner ring provided inside the top surface of the cap 3 and the sealing plate 7 of the spout 2.

  Further, as shown in FIG. 1, when the screwed position of the cap 3 is defined by the contact between the open end portion of the side wall 4 and the inner surface of the top surface of the cap 3, the water flowing through the jump screw portions 12 a to 12 c It is preferable to provide a gap between the opening of the cap 3 and the base portion of the spout 2 so that the cap 3 can be easily pulled out. On the other hand, when the screwed position of the cap 3 is defined by the contact between the opening of the cap 3 and the pedestal portion of the spout 2, concave portions are formed at positions in the pedestal portion of the spout 2 that are aligned with the jump screw portions 12a to 12c. By providing, the water flowing through the jump screw parts 12 a to 12 c may be easily removed to the outside of the cap 3. Alternatively, when the screwed position of the cap 3 is defined by abutment between the opening of the cap 3 and the pedestal portion of the spout 2, instead of providing a recess in the pedestal portion of the spout 2, of the lower peripheral edge of the peripheral wall portion of the cap, Even if a notch (recessed portion) is provided at a position aligned with the flying screw portions 12a to 12c, the effect of facilitating water removal can be obtained.

  Furthermore, the spout stopper according to each of the above embodiments can be used not only for paper pack containers but also for various container bodies such as pouches.

  INDUSTRIAL APPLICATION This invention is useful for the packaging container etc. which attached the spout stopper and the spout stopper.

1 Spout plug 2 Spout 3 Cap 4 Side wall 5 Male thread 6 Flange 11 Rib 12 Jump screw

Claims (4)

A spout plug,
A spout having a cylindrical side wall with one end opened, a male screw provided on the outer surface of the side wall, and a flange provided on the other end side of the side wall;
A cap screwed onto the spout,
The male screw is provided with a flying screw portion in which the cutout portion is arranged in the axial direction of the spout by cutting out the male screw intermittently at a constant period.
The spout stopper, wherein a thickness of a portion of the side wall corresponding to the jump screw portion is larger than a thickness of a portion where the jump screw portion is not provided.   The spout stopper according to claim 1, wherein a rib is provided on a portion of the inner peripheral surface of the side wall corresponding to the jump screw portion.   The spout stopper according to claim 1, wherein a thickness of a portion of the side wall corresponding to the jump screw portion increases from the one end of the spout toward the other end. A container body;
A packaging container comprising the spout stopper according to any one of claims 1 to 3 attached to the container body.

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